Preparation of 2,5-furandicarboxylic acid through continuous flow oxidation of 5-hydroxymethylfurfural under hypoxic condition

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL Applied Catalysis A: General Pub Date : 2025-04-25 Epub Date: 2025-02-25 DOI:10.1016/j.apcata.2025.120188

Bei Jiang , Ling Zhang , Wenjing Wang , Xin Qin , Shenyan Xu , Chunyu Che , Chuanqi Zhang , Wenzhong Wang

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Abstract

Continuous flow reactors have seldom been employed in investigations concerning 5-hydroxymethylfurfural (HMF) oxidation reactions. The root cause lies in the fact that, at atmospheric pressure, the solution exhibits a rather low oxygen content. In this research, we present a Ru-loaded manganese oxide octahedral molecular sieve (OMS-2) catalyst. Remarkably, this catalyst has exhibited the ability to achieve a 100 % conversion rate of HMF and attain a 94.5 % yield of FDCA under ambient air conditions within a continuous flow reactor. This can be mainly attributed to the superior oxygen adsorption and activation capacity of 0.05Ru-OMS-2. Thanks to this, it exhibits good performance even under hypoxic conditions. The combined results of EPR and XPS clearly showed that the Ru in the catalyst not only boosts the adsorption and transformation of O₂ but also weakens the Mn-O bond in the carrier, thus enhancing the activity of lattice oxygen.

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缺氧条件下5-羟甲基糠醛连续流氧化制备2,5-呋喃二羧酸

连续流反应器很少用于5-羟甲基糠醛（HMF）氧化反应的研究。根本原因在于，在大气压下，溶液中的氧含量相当低。在这项研究中，我们提出了一种负载钌的氧化锰八面体分子筛（OMS-2）催化剂。值得注意的是，该催化剂在连续流反应器中表现出了在环境空气条件下实现100% % HMF转化率和94.5 % FDCA产率的能力。这主要是由于0.05Ru-OMS-2具有优异的氧吸附和活化能力。因此，即使在缺氧条件下也能表现出良好的性能。EPR和XPS的综合结果清楚地表明，催化剂中的Ru不仅促进了O₂的吸附和转化，而且削弱了载体中的Mn-O键，从而提高了晶格氧的活性。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.